Hi guys! Thank you everyone for your replies, I really appreciate the input! Since I didn't feel like tossing out $40 for light meter that cost me $40, I went looking again for those posts I had seen about removing the washer from the battery.

And I found the thread! I may try the rubber o-ring method mentioned on page 2.

Also, on a note, I did find it pretty easy to remove the washers from the old batteries that were in it, but I'm not sure what size new-battery they would require.

This is kind of fun actually. I like working and researching vintage items